CN105667384B - Vehicle head lamp dynamic level adjusting method and device - Google Patents
Vehicle head lamp dynamic level adjusting method and device Download PDFInfo
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- CN105667384B CN105667384B CN201410664272.1A CN201410664272A CN105667384B CN 105667384 B CN105667384 B CN 105667384B CN 201410664272 A CN201410664272 A CN 201410664272A CN 105667384 B CN105667384 B CN 105667384B
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Abstract
A kind of vehicle head lamp dynamic level adjusting method and device, the adjusting method include：The height change value of vehicle body front axle and rear axle is obtained, calculates vehicle body antero posterior axis height change value；Calculate vehicle body angle changing value corresponding to the vehicle body antero posterior axis height change value；According to the vehicle body antero posterior axis height change value, the light height change value of the headlamp is calculated；Calculate light angle changing value corresponding to the light height change value of the headlamp；According to the vertical range of the vehicle body angle changing value, the light angle changing value, and headlamp regulation motor mechanism and headlamp reflection shield fixing axle, the adjustable range of headlamp is calculated；According to the adjustable range, the headlamp is adjusted.Using methods described and device, the precision that the headlamp dynamic level of vehicle is adjusted can be effectively improved, improves the security of driving at night.
Description
Technical field
The present invention relates to field of vehicle control, more particularly to a kind of vehicle head lamp dynamic level adjusting method and device.
Background technology
High intensity illumination (High Intensity Discharge, HID) lamp is a kind of can to provide high illumination intensity
Lighting car light, such as high intensity hernia lamp or LED etc., it is possible to increase vehicle is in the light intensity of night illumination, expansion driving
The visual field of the member in night running, provides safeguard for the security of night running, has been widely used in existing automobile.
But when vehicle front has car or pedestrian opposite sails next, due to the high illumination intensity of HID lamp, opposite can be given
Vehicle driver or pedestrian cause the dizziness of short time, and the hidden danger of traffic accident is buried for night running.
Therefore, with the application of high intensity xenon lamp or LED headlights, in order to lift the travel safety of traffic, Europe
The major countries such as various countries of alliance, the U.S., Japan put into effect laws and regulations to enter row constraint in succession for HID lamp, avoid vehicle from being expert at
The light beam of headlight influences opposite car or pedestrian during sailing.Such as：EU Committee is strong for the headlamp lighting used
When degree is more than 2000lm, increase headlamp automatic level adjusting device can be Qiang Zhiyaoqiud.Headlamp automatic level adjusting device is
Refer to when longitudinal direction of car angle changes, automatically adjust the device of optical axis of headlamp to offset the device of the angle change.
It thus is avoided that the light beam of headlamp is too high or too low so that the light that it irradiates is without prejudice to other traffic.
Existing headlamp automatic level adjusting device, car is identified by detecting the change of vehicle anterior and posterior height sensor
Regulation of longitudinal angle change, so as to carry out the Level tune of automatic headlamp.But existing headlamp automatic horizontal regulation is not
Accurately, certain influence is produced to the security of driving at night.
The content of the invention
The embodiment of the present invention solves the problems, such as be how to improve the accuracy that the headlamp of vehicle is adjusted, improve driving at night
Security.
To solve the above problems, the embodiment of the present invention provides a kind of vehicle head lamp dynamic level adjusting method, including：Obtain
The height change value of pick-up body front axle and rear axle, calculate vehicle body antero posterior axis height change value；Calculate the vehicle body antero posterior axis height
Vehicle body angle changing value corresponding to changing value；According to the vehicle body antero posterior axis height change value, the light of the headlamp is calculated
Height change value；Calculate light angle changing value corresponding to the light height change value of the headlamp；According to the body corner
Degree changing value, the light angle changing value, and headlamp regulation motor mechanism are vertical with headlamp reflection shield fixing axle
Distance, calculate the adjustable range of headlamp；According to the adjustable range, the headlamp is adjusted.
Optionally, the height change value for obtaining vehicle body front axle and rear axle, vehicle body antero posterior axis height change value, bag are calculated
Include：The automobile front-axle height change value Δ A is obtained respectivelyFAnd the vehicle rear axle height change value Δ AR；By the Δ ARWith
The Δ AFSubtract each other, obtain difference DELTA A=Δs AR-ΔAF, the Δ A is vehicle body antero posterior axis height change value.
Optionally, vehicle body angle changing value corresponding to the calculating vehicle body antero posterior axis height change value, including：By institute
State Δ A to substitute into β=arctan (Δ A/R), obtain vehicle body angle changing value β corresponding to vehicle body antero posterior axis height change value, its
In, the R is the distance of the vehicle antero posterior axis, and the Δ A is vehicle body antero posterior axis height change value.
Optionally, when the body gesture for calculating the vehicle changes, the light height change of the headlamp
Value, including：Δ H=- Δs AF+ UB × (Δ A/R), wherein, the lamp of the headlamp when Δ H changes for body gesture
Light height change value, the UB are the distance of the headlamp and the automobile front-axle, the Δ AFHighly become for automobile front-axle
Change value, the Δ A are vehicle body antero posterior axis height change value, and the R is the distance of the vehicle antero posterior axis.
Optionally, light angle changing value corresponding to the light height change value for calculating the headlamp, including：ε
=arctan (Δ H/LW), wherein, the ε is light angle changing value, the LW be when the vehicle remains static before
The expectation range of illuminator, the light height change value of the headlamp when Δ H changes for body gesture.
Optionally, it is described that electricity is adjusted according to the vehicle body angle changing value, the light angle changing value and headlamp
The height of machine mechanism, the adjustable range of headlamp is calculated, including：S=h × tan (β+ε), wherein, the S is the tune of headlamp
Pitch is from the h is the vertical range of headlamp regulation motor mechanism and headlamp reflection shield fixing axle, and the β is before vehicle body
Vehicle body angle changing value corresponding to rear axle height change value, the ε are light angle changing value.
Optionally, the vehicle head lamp dynamic level adjusting method also includes：The adjustable range of the headlamp is：
Wherein, the Δ A is vehicle body antero posterior axis height change value, the Δ AFFor automobile front-axle height change value, the R
For the distance of the vehicle antero posterior axis, the expectation range of headlamp, the UB when LW remains static for the vehicle
For the headlamp and the distance of the automobile front-axle, the h is that headlamp regulation motor mechanism is fixed with headlamp reflection shield
The vertical range of axle.
Optionally, the vehicle head lamp dynamic level adjusting method also includes：Obtain the purpose speed of the vehicle；Root
According to default speed and the corresponding relation at "cut-off"line inclination angle, obtain "cut-off"line corresponding to the purpose speed and tilt
Angle value；According to "cut-off"line inclination angle value corresponding to the purpose speed, the vehicle body angle changing value and described
Light angle changing value, calculate headlamp adjustable range corresponding to purpose speed.
Optionally, the "cut-off"line inclination angle value according to corresponding to the purpose speed, the vehicle antero posterior axis
Change inclination angle value and the light inclination angle value, calculate headlamp adjustable range corresponding to purpose speed, including：Si
=h × tan (β+ε+γ), wherein, the γ=θi-αi, the αiFor headlamp initial angle angle value, the θiFor purpose speed
Corresponding "cut-off"line inclination angle value, the h are hanging down for headlamp regulation motor mechanism and headlamp reflection shield fixing axle
Straight distance.
To solve the above problems, the embodiment of the present invention additionally provides a kind of vehicle head lamp dynamic level adjusting means, bag
Include：
First computing unit, for obtaining the height change value of vehicle body front axle and rear axle, calculate vehicle body antero posterior axis and highly become
Change value；
Second computing unit, for calculating vehicle body angle changing value corresponding to the vehicle body antero posterior axis height change value；
3rd computing unit, for according to the vehicle body antero posterior axis height change value, calculate the headlamp etc. it is too high
Spend changing value；
4th computing unit, for calculating light angle changing value corresponding to the light height change value of the headlamp；
5th computing unit, for according to the vehicle body angle changing value, the light angle changing value, and headlamp
The vertical range of regulation motor mechanism and headlamp reflection shield fixing axle, calculate the adjustable range of headlamp；
Adjustment unit, for according to the adjustable range, the headlamp to be adjusted.
Optionally, the vehicle head lamp dynamic level adjusting means also includes：
First acquisition unit, for obtaining the purpose speed of the vehicle；
Second acquisition unit, for the corresponding relation according to default speed and "cut-off"line inclination angle, described in acquisition
"cut-off"line inclination angle value corresponding to purpose speed；
6th computing unit, for "cut-off"line inclination angle value, the vehicle body according to corresponding to the purpose speed
Angle change value and the light angle changing value, calculate headlamp adjustable range corresponding to purpose speed.
Compared with prior art, the technical scheme of the embodiment of the present invention has advantages below：
When detecting that the front axle of vehicle and the height of rear axle change, calculated according to vehicle body antero posterior axis height change value
Vehicle body angle changing value, headlamp light height change value and light angle changing value corresponding to light height change value, from
And calculate the adjustable range of headlamp.Rather than directly the adjustable range of headlamp is entered according to vehicle body antero posterior axis height change value
Row calculate, when having taken into full account when vehicle body antero posterior axis height change caused by headlamp light height change value and light
Angle change value, therefore can according to headlamp light height change value and light angle changing value calculating headlamp adjustable range
With more accurate.
Further, when vehicle travels, according to the purpose speed of the vehicle got, obtain corresponding with purpose speed bright
Dark dead line inclination angle value, highly becomes according to "cut-off"line inclination angle value corresponding to purpose speed and vehicle antero posterior axis
Caused vehicle antero posterior axis change inclination angle value, light inclination angle value, calculate headlamp corresponding to purpose speed and adjust during change
Pitch is from so that the range of headlamp can be adjusted correspondingly with the travel speed of vehicle, further improving night
Between vehicling lighting security.
Brief description of the drawings
Fig. 1 is a kind of flow chart of vehicle head lamp dynamic level adjusting method in the embodiment of the present invention；
Fig. 2 is the flow chart of another vehicle head lamp dynamic level adjusting method in the embodiment of the present invention；
Fig. 3 is a kind of car speed and "cut-off"line angle of inclination corresponding relation schematic diagram in the embodiment of the present invention；
Fig. 4 is a kind of structural representation of vehicle head lamp dynamic level adjusting means in the embodiment of the present invention.
Embodiment
Existing headlamp automatic level adjusting device, car is identified by detecting the change of vehicle anterior and posterior height sensor
Regulation of longitudinal angle change, so as to carry out the Level tune of automatic headlamp.But existing headlamp automatic horizontal regulation is not
Accurately, certain influence is produced to the security of driving at night.
In the embodiment of the present invention, when the antero posterior axis of vehicle highly changes, according to vehicle body antero posterior axis height change value
Calculate vehicle body angle changing value, headlamp light height change value and light angle change corresponding to light height change value
Value, is fixed according to vehicle body angle changing value, light angle changing value and headlamp regulation motor mechanism and headlamp reflection shield
The vertical range of axle, the adjustable range of headlamp is calculated, headlamp is adjusted according to adjustable range.Rather than direct basis
Headlamp is adjusted vehicle body antero posterior axis height change value, due to having taken into full account when vehicle body antero posterior axis height change, draws
The headlamp light height change value and light angle changing value risen, therefore according to headlamp light height change value and lamp
Angular changing value calculates headlamp adjustable range can be more accurate.
It is understandable to enable the above-mentioned purpose of the embodiment of the present invention, feature and advantage to become apparent, it is right below in conjunction with the accompanying drawings
The specific embodiment of the present invention is described in detail.
The embodiments of the invention provide a kind of vehicle head lamp dynamic level adjusting method, reference picture 1, below by way of specific
Step is described in detail.
Step S101, the height change value of vehicle body front axle and rear axle is obtained, calculate vehicle body antero posterior axis height change value.
In specific implementation, electronic control unit (Electronic Control Unit, ECU) can be by being arranged on
Sensor on vehicle monitors whether the height of vehicle body front axle and rear axle changes.For example, can be respectively before vehicle body
Axle and rear axle set front axle height sensor and rear axle height sensor, to obtain vehicle body front axle height and rear axle height in real time.
When the vehicle body front axle height value difference that the vehicle body front axle height value that gets once is got with preceding, then it represents that vehicle body front axle is high
Degree is changed.When the vehicle body rear axle height value difference that the vehicle body rear axle height value that gets once is got with preceding, then
Represent that vehicle body rear axle height is changed, that is to say, that the posture of vehicle body is changed.
When detecting that vehicle body front axle highly changes, or vehicle body rear axle highly changes, or vehicle body predecessor antero posterior axis
When height changes, vehicle body antero posterior axis height change value can be calculated.By the vehicle body front axle currently got height with it is upper
The vehicle body front axle once got highly makes the difference, and can obtain vehicle body front axle height change value；After the vehicle body currently got
The vehicle body rear axle that axle height is got with the last time highly makes the difference, and can obtain vehicle body rear axle height change value.After vehicle body
Axle height change value and vehicle body front axle height change value, can obtain vehicle body antero posterior axis height change value.
In an embodiment of the present invention, vehicle body front axle height change value is Δ AF, vehicle body rear axle height change value is Δ AR,
Then vehicle body antero posterior axis height change value Δ A is Δ A=Δs AR-ΔAF。
Step S102, calculate vehicle body angle changing value corresponding to the vehicle body antero posterior axis height change value.
In specific implementation, when the antero posterior axis of vehicle body highly changes, correspondingly, the angle value of vehicle body longitudinal direction also can
Change corresponding to occurring.Can according to the vehicle body antero posterior axis height change value and vehicle body antero posterior axis being calculated in step S101 it
Between distance, calculate vehicle body angle changing value.
In an embodiment of the present invention, the distance between vehicle body antero posterior axis is R, corresponding to vehicle body antero posterior axis height change value
Vehicle body angle changing value is：β=arctan (Δ A/R).
Step S103, according to the vehicle body antero posterior axis height change value, calculate the light height change value of the headlamp.
In specific implementation, because vehicle body antero posterior axis height is changed, i.e. the posture of vehicle body is changed, therefore
The headlamp for being fixedly mounted on headstock can also change relative to the position on ground with the change of vehicle body antero posterior axis height.
Correspondingly, corresponding change can also occur for the light height of headlamp.Before and after can be according to the vehicle body got in step S101
Horizontal range between axle height change value, vehicle body front axle height change value and vehicle body front axle and headlamp, calculate headlamp
Light height change value.
In an embodiment of the present invention, when vehicle body antero posterior axis highly changes, the light height change value of headlamp
For：Δ H=- Δs AF+ UB × (Δ A/R), wherein, horizontal ranges of the UB between vehicle body front axle and headlamp, Δ AFBefore vehicle body
Axle height change value.
Step S104, calculate light angle changing value corresponding to the light height change value of the headlamp.
In specific implementation, when the light height value of headlamp changes, the headlamp related to light height value
Light angle can also occur to change accordingly.Can according to the headlamp light height change value obtained in step S103 and
Expectation range when vehicle remains static, calculate light angle changing value caused by light height change value.In the present invention
In one embodiment, the distance phase on the initial angle of vehicle body and headlamp and ground when range remains static with vehicle it is expected
Close.
In an embodiment of the present invention, light angle changing value is ε=arctan (Δ H/LW), and LW is that vehicle is in static
Expectation range during state, LW=H/tan θ, H is headlamps and the distance on ground, vehicle body when θ remains static for vehicle
Initial angle.
Step S105, according to the vehicle body angle changing value, the light angle changing value, and headlamp regulation motor
The vertical range of mechanism and headlamp reflection shield fixing axle, calculate the adjustable range of headlamp.
, can be according to vehicle body angle changing value that above-mentioned steps are calculated, light angle changing value in specific implementation
And the vertical range of the headlamp regulation motor mechanism got in advance and headlamp reflection shield fixing axle, calculate headlamp
Adjustable range.
In an embodiment of the present invention, the adjustable range of headlamp is calculated by equation below：
S=h × tan (β+ε), wherein, h be headlamp regulation motor mechanism it is vertical with headlamp reflection shield fixing axle away from
From, when β is that vehicle body antero posterior axis highly changes, vehicle body angle changing value corresponding to vehicle body antero posterior axis height change value；ε is car
When body antero posterior axis highly changes, light angle changing value corresponding to the light height change value of headlamp.
In an alternative embodiment of the invention, the adjustable range of headlamp is calculated by equation below：
Wherein, h is the vertical range of headlamp regulation motor mechanism and headlamp reflection shield fixing axle, and Δ A is before vehicle body
Rear axle height change value, R are the distance between vehicle body antero posterior axis, the expectation photograph of headlamp when LW remains static for vehicle
Away from, horizontal ranges of the UB between vehicle body front axle and headlamp, Δ AFFor vehicle body front axle height change value.
It is mainly related to the intrinsic parameter of body gesture and vehicle body to the adjustable range of headlamp from above formula, car
Figure state is vehicle body antero posterior axis height change value, vehicle body front axle height change value, the intrinsic parameter of vehicle body for vehicle body antero posterior axis it
Between distance, the horizontal range for it is expected range, vehicle body front axle and headlamp of headlamp etc..Only need to obtain above-mentioned value, you can
Obtain accurately to the adjustable range of headlamp.
Step S106, according to the adjustable range, the headlamp is adjusted.
In specific implementation, headlamp regulation motor mechanism can be integrated in the stepper motor in vehicle lamp assembly, stepping
The diverging lens of motor and headlamp connect, and are moved by stepper motor, promote the diverging lens of headlamp to move, to enter to headlamp
Row regulation.
In an embodiment of the present invention, according to the adjustable range being calculated in step S105, with reference to the step of stepper motor
Away from the step pitch of adjustable range and stepper motor is divided by, you can obtain the step number for needing stepper motor to move, stepper motor performs
Corresponding motion step number, by the position adjustments of headlamp to corresponding position, you can realize the regulation to headlamp.
It can be seen that when detecting that the front axle of vehicle and the height of rear axle change, according to vehicle body antero posterior axis height change
Value calculates vehicle body angle changing value, headlamp light height change value and light angle change corresponding to light height change value
Value, so as to calculate the adjustable range of headlamp.Rather than directly according to regulation of the vehicle body antero posterior axis height change value to headlamp
Distance is calculated, when having taken into full account when vehicle body antero posterior axis height change caused by headlamp light height change value with
And light angle changing value, therefore headlamp regulation is calculated according to headlamp light height change value and light angle changing value
Distance can be more accurate.
According to the headlamp adjustable range obtained in step S105 it is known that headlamp adjustable range mainly with vehicle body appearance
State and the intrinsic parameter of vehicle body are related, therefore, corresponding to different vehicles, as long as the intrinsic parameter of vehicle body corresponding to change, inspection
The change for obtaining body gesture is surveyed, method according to embodiments of the present invention can obtain the regulation of the vehicle head lamp of different automobile types
Distance.
According to an embodiment in the present invention, can when vehicle remains static, obtain accurate headlamp regulation away from
From.In actual applications, when vehicle carries out acceleration or deceleration, particularly when vehicle accelerates suddenly or during emergency brake, vehicle body
Larger change can occur between the short time for posture.Accordingly, it is desirable to headlamp under the above situation is adjusted, to avoid
The inclination angle of the "cut-off"line of headlamp goes beyond the scope during acceleration and deceleration, influences driving at night.
The embodiments of the invention provide another vehicle head lamp dynamic level adjusting method, reference picture 2, below by way of tool
Body step is described in detail.
Step S201, obtain the purpose speed of vehicle.
In embodiments of the present invention, ECU can be according to the opening and closing degree of vehicle accelerator pedal or the brake of brake pedal
Degree, to calculate the purpose speed of vehicle, default "cut-off"line gradient is obtained according to the purpose speed of vehicle.
Step S202, according to default speed and the corresponding relation at "cut-off"line inclination angle, it is corresponding to obtain purpose speed
"cut-off"line inclination angle value.
In embodiments of the present invention, can preset the purpose speed of vehicle and default "cut-off"line gradient it
Between mapping relations.Reference picture 3, in Fig. 3,301 be expressed as corresponding in existing headlamp standard speed allowed it is maximum bright
Dark dead line inclination angle, 302 are expressed as corresponding to the minimum "cut-off"line inclination that speed is allowed in existing headlamp standard
Angle, 303 are expressed as the corresponding relation of the speed and "cut-off"line inclination angle value in one embodiment of the invention, and ordinate represents
For "cut-off"line inclination angle value, unit is 1 percent radians, and abscissa is expressed as the speed of vehicle, and unit is that km is every
Hour (km/h).According to purpose speed and Fig. 3, you can obtain "cut-off"line inclination angle value corresponding to purpose speed.
From figure 3, it can be seen that the "cut-off"line inclination angle of vehicle changes with the change of Vehicle Speed, example
Such as, when Vehicle Speed is 10km/h, "cut-off"line inclination angle value is -1.8 (1 percent radians), and vehicle travels
When speed is 90km/h, "cut-off"line inclination angle value is -1.0 (1 percent radians).Therefore, when calculating vehicle traveling
Headlamp adjustable range when, it is necessary to consider "cut-off"line inclination angle corresponding to the target velocity of vehicle, can just obtain essence
True headlamp adjustable range.
Step S203, according to "cut-off"line inclination angle value, vehicle body angle changing value and lamp corresponding to purpose speed
Angular changing value, calculate headlamp adjustable range corresponding to purpose speed.
In an embodiment of the present invention, when vehicle accelerates suddenly or during emergency brake, can obtain corresponding to before and after vehicle body
Axle height change value, vehicle body angle changing value and light angle changing value, meter are calculated according to vehicle body antero posterior axis height change value
Calculation process is referred to step S101~S104, and here is omitted.
After vehicle body angle changing value and light angle changing value is calculated, headlamp corresponding to purpose speed is adjusted
Distance is：Si=h × tan (β+ε+γ), wherein：
γ=θi-αi, αiFor when a vehicle is at rest, the initial angle angle value of headlamp, θiIt is corresponding for purpose speed
"cut-off"line inclination angle value.
Step S204, according to adjustable range, headlamp is adjusted.
In an embodiment of the present invention, according to the adjustable range being calculated in step S203, with reference to the step of stepper motor
Away from the step pitch of adjustable range and stepper motor is divided by, you can obtain the step number for needing stepper motor to move, stepper motor performs
Corresponding motion step number, by the position adjustments of headlamp to corresponding position, so as to realize the regulation to headlamp.
It was found from from step S201~step S204, when vehicle travels, the headlamp adjustable range of vehicle and vehicle
"cut-off"line inclination angle value, vehicle body angle changing value and light angle changing value are related corresponding to purpose speed.Change sentence
Talk about, light and shade is cut when vehicle is in transport condition, it is necessary to according to corresponding to the purpose speed of vehicle obtains purpose speed successively
Only line inclination angle value, vehicle body angle changing value and light angle changing value, according to above three parameter, it can just calculate essence
True headlamp adjustable range.
It can be seen that when vehicle travels, according to the purpose speed of the vehicle got, light and shade corresponding with purpose speed is obtained
Dead line inclination angle value, highly become according to "cut-off"line inclination angle value corresponding to purpose speed, and vehicle antero posterior axis
Caused vehicle antero posterior axis change inclination angle value, light inclination angle value, calculate headlamp corresponding to purpose speed and adjust during change
Pitch is from so that the range of headlamp can be adjusted correspondingly with the travel speed of vehicle, further improving night
Between vehicling lighting security.
The embodiment of the present invention additionally provides a kind of vehicle head lamp dynamic level adjusting means 40, including：First calculates list
Member, the second computing unit, the 3rd computing unit, the 4th computing unit, the 5th computing unit and adjustment unit, wherein：
First computing unit 401, for obtaining the height change value of vehicle body front axle and rear axle, calculate vehicle body antero posterior axis height
Changing value；
Second computing unit 402, for calculating vehicle body angle changing value corresponding to the vehicle body antero posterior axis height change value；
3rd computing unit 403, for according to the vehicle body antero posterior axis height change value, calculating waiting for the headlamp
Height change value；
4th computing unit 404, change for calculating light angle corresponding to the light height change value of the headlamp
Value；
5th computing unit 405, for according to the vehicle body angle changing value, the light angle changing value, Yi Jiqian
The vertical range of illuminator regulation motor mechanism and headlamp reflection shield fixing axle, calculate the adjustable range of headlamp；
Adjustment unit 406, for according to the adjustable range, the headlamp to be adjusted.
In specific implementation, vehicle head lamp dynamic level adjusting means can also include：
First acquisition unit, for obtaining the purpose speed of the vehicle；
Second acquisition unit, for the corresponding relation according to default speed and "cut-off"line inclination angle, described in acquisition
"cut-off"line inclination angle value corresponding to purpose speed；
6th computing unit, for "cut-off"line inclination angle value, the vehicle body according to corresponding to the purpose speed
Angle change value and the light angle changing value, calculate headlamp adjustable range corresponding to purpose speed.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
To instruct the hardware of correlation to complete by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from
In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (11)
- A kind of 1. vehicle head lamp dynamic level adjusting method, it is characterised in that including：The height change value of vehicle body front axle and rear axle is obtained, calculates vehicle body antero posterior axis height change value；Calculate vehicle body angle changing value corresponding to the vehicle body antero posterior axis height change value；According to the vehicle body antero posterior axis height change value, the light height change value of the headlamp is calculated；Calculate light angle changing value corresponding to the light height change value of the headlamp；According to the vehicle body angle changing value, the light angle changing value, and headlamp regulation motor mechanism and headlamp The vertical range of reflection shield fixing axle, calculate the adjustable range of headlamp；According to the adjustable range, the headlamp is adjusted.
- 2. vehicle head lamp dynamic level adjusting method as claimed in claim 1, it is characterised in that the acquisition vehicle body front axle With the height change value of rear axle, vehicle body antero posterior axis height change value is calculated, including：The automobile front-axle height change value Δ A is obtained respectivelyFAnd the vehicle rear axle height change value Δ AR；By the Δ ARWith the Δ AFSubtract each other, obtain difference DELTA A=Δs AR-ΔAF, the Δ A is vehicle body antero posterior axis height change Value.
- 3. vehicle head lamp dynamic level adjusting method as claimed in claim 1, it is characterised in that described to calculate the vehicle body Vehicle body angle changing value corresponding to antero posterior axis height change value, including：Δ A is substituted into β=arctan (Δ A/R), obtains car Vehicle body angle changing value β corresponding to body antero posterior axis height change value, wherein, the R is the distance of the vehicle antero posterior axis, described Δ A is vehicle body antero posterior axis height change value.
- 4. vehicle head lamp dynamic level adjusting method as claimed in claim 1, it is characterised in that calculate the car of the vehicle When figure state changes, the light height change value of the headlamp, including：Δ H=- Δs AF+ UB × (Δ A/R), wherein, The light height change value of the headlamp when Δ H changes for body gesture, the UB are the headlamp and institute State the distance of automobile front-axle, the Δ AFFor automobile front-axle height change value, the Δ A is vehicle body antero posterior axis height change value, The R is the distance of the vehicle antero posterior axis.
- 5. vehicle head lamp dynamic level adjusting method as claimed in claim 1, it is characterised in that described to calculate the preceding photograph Light angle changing value corresponding to the light height change value of lamp, including：ε=arctan (Δ H/L W), wherein, the ε is lamp Angular changing value, the LW are the expectation range of headlamp when the vehicle remains static, and the Δ H is body gesture The light height change value of headlamp when changing.
- 6. vehicle head lamp dynamic level adjusting method as claimed in claim 1, it is characterised in that described according to the vehicle body The height of angle change value, the light angle changing value and headlamp regulation motor mechanism, calculate the regulation of headlamp away from From, including：S=h × tan (β+ε), wherein, the S is the adjustable range of headlamp, and the h is headlamp regulation motor mechanism With the vertical range of headlamp reflection shield fixing axle, the β is vehicle body angle change corresponding to vehicle body antero posterior axis height change value Value, the ε is light angle changing value.
- 7. vehicle head lamp dynamic level adjusting method as claimed in claim 1, it is characterised in that also include：Shone before described The adjustable range of lamp is：<mrow> <mi>S</mi> <mo>=</mo> <mi>h</mi> <mo>&times;</mo> <mfrac> <mrow> <mi>&Delta;</mi> <mi>A</mi> </mrow> <mi>R</mi> </mfrac> <mo>+</mo> <mi>h</mi> <mo>&times;</mo> <mfrac> <mrow> <mo>-</mo> <msub> <mi>&Delta;A</mi> <mi>F</mi> </msub> </mrow> <mrow> <mi>L</mi> <mi>W</mi> </mrow> </mfrac> <mo>+</mo> <mi>h</mi> <mo>&times;</mo> <mfrac> <mrow> <mi>U</mi> <mi>B</mi> <mo>&times;</mo> <mi>&Delta;</mi> <mi>A</mi> </mrow> <mrow> <mi>L</mi> <mi>W</mi> <mo>&times;</mo> <mi>R</mi> </mrow> </mfrac> <mo>;</mo> </mrow>Wherein, the Δ A is vehicle body antero posterior axis height change value, the Δ AFFor automobile front-axle height change value, the R is institute The distance of vehicle antero posterior axis is stated, the LW is the expectation range of headlamp when the vehicle remains static, and the UB is institute The distance of headlamp and the automobile front-axle is stated, the h is headlamp regulation motor mechanism and headlamp reflection shield fixing axle Vertical range.
- 8. the vehicle head lamp dynamic level adjusting method as described in any one of claim 1 to 7, it is characterised in that also include：Obtain the purpose speed of the vehicle；According to default speed and the corresponding relation at "cut-off"line inclination angle, obtain light and shade corresponding to the purpose speed and end Line inclination angle value；According to "cut-off"line inclination angle value, the vehicle body angle changing value and the light corresponding to the purpose speed Angle change value, calculate headlamp adjustable range corresponding to purpose speed.
- 9. vehicle head lamp dynamic level adjusting method as claimed in claim 8, it is characterised in that described according to the purpose "cut-off"line inclination angle value, vehicle antero posterior axis change inclination angle value and the light inclination angle corresponding to speed Angle value, headlamp adjustable range corresponding to purpose speed is calculated, including：Si=h × tan (β+ε+γ), wherein, the SiFor mesh Speed corresponding to headlamp adjustable range, the β is vehicle body angle changing value, institute corresponding to vehicle body antero posterior axis height change value It is light angle changing value to state ε, the γ=θi-αi, the αiFor headlamp initial angle angle value, the θiFor purpose speed pair The "cut-off"line inclination angle value answered, the h are that headlamp regulation motor mechanism is vertical with headlamp reflection shield fixing axle Distance.
- A kind of 10. vehicle head lamp dynamic level adjusting means, it is characterised in that including：First computing unit, for obtaining the height change value of vehicle body front axle and rear axle, calculate vehicle body antero posterior axis height change value；Second computing unit, for calculating vehicle body angle changing value corresponding to the vehicle body antero posterior axis height change value；3rd computing unit, for according to the vehicle body antero posterior axis height change value, calculate the headlamp to wait height to become Change value；4th computing unit, for calculating light angle changing value corresponding to the light height change value of the headlamp；5th computing unit, for being adjusted according to the vehicle body angle changing value, the light angle changing value, and headlamp Motor mechanism and the vertical range of headlamp reflection shield fixing axle, calculate the adjustable range of headlamp；Adjustment unit, for according to the adjustable range, the headlamp to be adjusted.
- 11. vehicle head lamp dynamic level adjusting means as claimed in claim 10, it is characterised in that also include：First acquisition unit, for obtaining the purpose speed of the vehicle；Second acquisition unit, for the corresponding relation according to default speed and "cut-off"line inclination angle, obtain the purpose "cut-off"line inclination angle value corresponding to speed；6th computing unit, for "cut-off"line inclination angle value, the vehicle body angle according to corresponding to the purpose speed Changing value and the light angle changing value, calculate headlamp adjustable range corresponding to purpose speed.
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| CN106809109B (en) * | 2017-02-22 | 2019-04-02 | 北京经纬恒润科技有限公司 | A kind of control method of headlight tilt adjustment, apparatus and system |
| CN106828286B (en) * | 2017-02-22 | 2019-03-29 | 北京经纬恒润科技有限公司 | A kind of the headlamp tilt adjustment method, apparatus and system of vehicle |
| CN107203675B (en) * | 2017-06-19 | 2020-08-18 | 江西昌河汽车有限责任公司 | Lower-beam inclination matching method and system for headlamps |
| CN107314892B (en) * | 2017-06-28 | 2023-09-26 | 奇瑞汽车股份有限公司 | Method and device for testing road illumination performance of vehicle headlamp |
| KR102419039B1 (en) * | 2017-10-24 | 2022-07-12 | 현대자동차주식회사 | Compensation method for headlamp using ldws(lane departure warning system) |
| CN109442338B (en) * | 2018-10-09 | 2020-12-08 | 来斯奥集成家居股份有限公司 | Anti-dazzle self-adaptive adjustment control method for automobile illumination |
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